docs: def _setrow(self, row):
          """
          Parameters
          ----------
          row : a list or tuple
              the list or tuple containing ordered elements::
  
                  kwd, innode, outnode, compname, thcomp
  
              followed by comments & other ignored things
          """
          try:
              compname, kwd, innode, outnode, thcomp = row[0:5]
          except ValueError:
              raise ValueError('Error unpacking row: %s'%row)
  
          #Innode is an integer
          k=int(innode)
  
          #"Clear" should become None
          if compname == 'clear':
              compname = None
          if thcomp == 'clear':
              thcomp = None
  
          #Now create the GraphNode defined by this row,
          #and add it to the table. Default nodes are special.
          if kwd == 'default':
              self.tab[k].set_default(int(outnode),compname, thcomp)
          else:
              try:
                  self.tab[k].set_named(kwd,int(outnode),compname, thcomp)
              except IndexError:
                  old = self.tab[k].get_named(kwd)
                  plist = (k, kwd, old, (outnode, compname, thcomp))
                  self.problemset.add(plist)